do a computer science program

Create a program that finds shortest flight routes between two cities . If a route is found the program outputs the list of connecting cities. (Think of these as flight stops at corresponding airports.) Otherwise the program indicates that no route was found. The sense in which a route is shortest is simply having the least number of connections. That means we can use the breadth first search algorithm shown in class. (Using Dijkstra's algorithm would be overkill.)

To create the graph, your program will read in the file connections.txt. Be careful when creating the lookup table for city names, because some cities with a From: entry do not have any To: entry (you can fly out but not in). It's also possible that a city appearing under To: has no From: entry (can fly in but not out). Be prepared for some wacky results since the connections in the file have no relation to actual connections between real airports.

To select start and destination cities, the user can type in a string, normally the beginning of a city name, and the program will list matching cities, from which the user can select via a number. The program should only accept strings that are of length two or more as input. To find matches it simply looks for the user's string as a substring of city names in the lookup table. Ignore case when looking for substrings.

Upload your source file(s) and a text file with copied output from a sample run of the program with multiple searches.

The output below is from a sample solution. Your program output should be similar. (Not necessarily identical in format). For the city numbers you can use the indexes in your lookup table (as is done below) or number them 1, 2, 3 etc. (more work but user friendly).

Output:

Reading cities from file...

...Finished...

--------------------------------------------------------------------

Please enter a departing city name or "quit" to exit: S

Please use at least two characters.

Please enter a departing city name or "quit" to exit: Sa

30: Casablanca, Morocco

53: Hong Kong, SAR

58: Jeddah, Saudi Arabia

73: Lusaka, Zambia

92: Osaka, Japan

104: Riyadh, Saudi Arabia

106: Saint Louis, United States

107: Saint Petersburg, Russia

108: San Francisco, United States

109: San Jose, Costa Rica

110: San Juan, Puerto Rico

111: Santiago, Chile

112: Santo Domingo, Dominican Republic

113: Sao Paulo, Brazil

133: Warsaw, Poland

137: Winston-Salem, United States

Please select a departing city by entering a number from the list above: 108

Selected Departure: 108: San Francisco, United States

Please enter a destination city or "quit" to exit: los angeles

72: Los Angeles, United States

Please select a destination by entering a number from the list above: 72

Selected Destination: 72: Los Angeles, United States

Shortest Route:

San Francisco, United States --> Jeddah, Saudi Arabia --> Montevideo, Uruguay --> Seoul, South Korea --> Seattle, United States --> Los Angeles, United States

Make another search? ("yes" or "no"): yes

Please enter a departing city name or "quit" to exit: new

9: Auckland, New Zealand

90: New Delhi, India

91: New York City, United States

135: Wellington, New Zealand

Please select a departing city by entering a number from the list above: 91

Selected Departure: 91: New York City, United States

Please enter a destination city or "quit" to exit: Paris

96: Paris, France

Please select a destination by entering a number from the list above: 96

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